Changes in the latitudinal and longitudinal distribution of the - - PowerPoint PPT Presentation

SLIDE 1

Changes in the latitudinal and longitudinal distribution

• f the aggregations of jack mackerel (Trachurus murphyi)

in the Peruvian sea during 1996 - 2007

Ericka Espinoza, Miguel Ñiquen & Roberto Flores

Present by:

Chilean Jack Mackerel Workshop 30 June - 4 July 2008

SLIDE 2

Introduction:

ECUADOR PESQUERIA PERUANA

PACIFICO SUD ORIENTAL

Pesquería Pesquería Perú Perú Pesquería Pesquería Norte Norte-Chile Chile Pesquería Pesquería Coquimbo Coquimbo Pesquería Pesquería Sur Sur-Chile Chile Pesquería Internacional

According to landings of IMARPE (2006), jack mackerel represented the third most important resource in the fishery

1 1 1.2

IMARPE, 2006

In Peru, jack mackerel is found along of all the coast and it has been recorded to 200 – 350 nm. Jack mackerel is a highly migratory pelagic species widespread in the South Pacific Ocean

Distribución de la Especie Localización de las pesquerías Limite de las 200 millas

Distribución y localización de las principales áreas de pesca de jurel en el Pacifico Sur (Serra, 1991)

0.3 0.28 0.1 0.03 0.2 0.4 0.6 0.8 1

An ch Pota Ju rel Caballa M erlu z a

In the Peruvian sea is not recognized a clear pattern of migratory behavior of jack mackerel throughout its life cycle

SLIDE 3

Methodology:

Area study Obtaining of the information Analysis of the information

LOOP

To describe the changes in the latitudinal and longitudinal distribution of jack mackerel in the Peruvian Sea during 1996 - 2007 and their relationship to the dominanceof some types of water masses.

Objective:

1996 - 2007

LOOP

(Logbook-On board Observers Program)

Sampling in situ

Purse seine fleet

Adults 30 cm 31 cm Juveniles

Total length

Minimum size of capture = 31 cm

Cruise: Pelagic and Oceanographic Scientific surveys

> =51%

Juveniles

> =51%

Adults

SLIDE 4

10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50

• 03º
• 04º
• 05º
• 06º
• 07º
• 08º
• 09º
• 10º
• 11º
• 12º
• 13º
• 14º
• 15º
• 16º
• 17º
• 18º

1996 1997 1998 1999 2000 2001

Latitudinal grade

El Niño

El Niño

High incidence of juveniles

Results: Results:

Latitudinal and longitudinal size composition of jack mackerel catches Latitudinal and longitudinal size composition of jack mackerel catches

1996 1997 1998 1999 2000 2001

ADULTS Where and why were gone?

10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250

Distance to the coast (nm)

Total lenght (cm)

SLIDE 5

El Niño

2002 2003 2004 2005 2006 2007

• 03º
• 04º
• 05º
• 06º
• 07º
• 08º
• 09º
• 10º
• 11º
• 12º
• 13º
• 14º
• 15º
• 16º
• 17º

Latitudinal grade

• 18º

Latitudinal and longitudinal size composition of jack mackerel catches Latitudinal and longitudinal size composition of jack mackerel catches

10 20 30 40 5010 20 30 40 5010 20 30 40 50 10 20 30 40 5010 20 30 40 50 10 20 30 40 50

The smaller sizes were located to the south extreme of their distribution

10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50

Distance to the coast (nm)

Total lenght (cm)

SLIDE 6

Size composition of jack mackerel catches by biological year

ize composition of jack mackerel catches by biological year

15 30 15 30 15 30 15 30 15 30 15 30

1996 = 56% Juv 1997 = 38% Juv 1998 = 47% Juv 1999 = 94% Juv 2000 = 80% Juv 2001 = 93% Juv

e frequency % From 1999 to 2005, the juveniles observed in 1999 could have constituted the group of the following years.

15 30 15 30 15 30 15 30 15 30 15 30 10 20 30 40 50 Total length (cm)

2002 = 46% Juv 2003 = 43% Juv 2004 = 02% Juv 2005 = 64% Juv 2006 = 95% Juv 2007 = 51% Juv

Relative could have constituted the group of the following years. This would indicate that jack mackerel stayed in Peruvian waters.

SLIDE 7

Juveniles

Scenario1 Scenario 2

D.C (nm):

140 20

• 18
• 16
• 14
• 12
• 10
• 8
• 6
• 4

PAITA

• PTA. FALSA

PIMENTEL CHICAMA CHIMBOTE HUARMEY HUACHO CALLAO CERRO AZUL PISCO

• PTA. DOÑA MARIA

SAN JUAN ATICO QUILCA ILO

1996 1997 1998

1999

2000 2001 2002 2003 2004 2005 2006 2007

v v

170 20 170 20 60 10 70 10 70 60 160 20 250 20 200 20 130 10 150 10 250 20

Adults

Changes in the distribution of jack mckerel Changes in the distribution of jack mckerel

Purse seine fleet – fishing sets “"disappeared" of the north zone

• Pto. Pizarro
• Pta. Sal

Talara Paita

• Pta. Gobernador
• Pta. La Negra

Mórrope Pimentel Chérrepe Chicama Salaverry Punta Chao Chimbote Casma Punta Lobos Huarmey Punta Bermejo Supe Huacho Chancay Callao Pucusana Cerro Azul Tambo de Mora Pisco Bahía Independencia Punta Infiernillos Punta Caballas San Juan Chala Atico Ocoña Quilca Mollendo Ilo M 1 5 10 50 100 250 500 750 1000

Distribución de jurel

VALORES ECOINTEGRADOS (m²/mn²)

• Cr. 0202-03
• Cr. 0302-04
• Cr. 0402-04
• Cr. 0502-04
• Cr. 0702-03
• Cr. 0602-04

° S ° S ° S ° S ° S ° S ° S ° S

• Pto. Pizarro
• Pta. Sal

Talara Paita

• Pta. Gobernador
• Pta. La Negra

Mórrope Pimentel Chérrepe Chicama Salaverry Punta Chao Chimbote Casma Punta Lobos Huarmey Punta Bermejo Supe Huacho Chancay Callao Pucusana Cerro Azul Tambo de Mora Pisco Bahía Independencia Punta Infiernillos Punta Caballas San Juan Chala Atico Ocoña Quilca Mollendo Ilo M. 1 5 10 50 100 250 500 750 1000

Distribución de jurel

VALORES ECOINTEGRADOS (m²/mn²)

• Cr. 9602-04

Cr.9703-04 Cr 9803-05

• CR. 9902-03
• CR. 0103-04
• CR. 0002-03

Acoustic survey

SLIDE 8

Jack mackerel and its relation with water masses Jack mackerel and its relation with water masses

The data analyzed of jack mackerel

and water mass corresponded only to summers

• Pto. Pizarro

Talara Paita

• Pta. La Negra

Pimentel Chicama Salaverry Chimbote Casma Huarmey Huacho Callao Cerro Azul Pisco

• Pta. Dona Maria

Punta Sal Punta Gobernador Morrope Cherrepe Punta Chao Punta Lobos

• Pto. Bermejo

Supe Chancay Pucusana Tambo de Mora Bahia Independencia

CRUCERO 960204 SALINIDAD (UPS)

• Pto. Pizarro

Talara Paita

• Pta. La Negra

Pimentel Chicama Salaverry Chimbote Casma Huarmey Huacho Callao Cerro Azul Pisco

• Pta. Dona Maria

Punta Sal Punta Gobernador Morrope Cherrepe Punta Chao Punta Lobos

• Pto. Bermejo

Supe Chancay Pucusana Tambo de Mora Bahia Independencia Punta Caballas

CRUCERO 990203 SALINIDAD (UPS)

• Pto. Pizarro

Talara Paita

• Pta. La Negra

Pimentel Chicama Salaverry Chimbote Casma Huarmey Huacho Callao Cerro Azul Pisco

• Pta. Dona Maria

Punta Sal Punta Gobernador Morrope Cherrepe Punta Chao Punta Lobos

• Pto. Bermejo

Supe Chancay Pucusana Tambo de Mora Bahia Independencia

CRUCERO 000103 SALINIDAD (UPS)

• Pto. Pizarro

Talara Paita

• Pta. La Negra

Pimentel Chicama Salaverry Chimbote Casma Huarmey Huacho Callao Cerro Azul Pisco

• Pta. Dona Maria

Punta Sal Punta Gobernador Morrope Cherrepe Punta Chao Punta Lobos

• Pto. Bermejo

Supe Chancay Pucusana Tambo de Mora Bahia Independencia

CRUCERO 970204 SALINIDAD (UPS)

• Pto. Pizarro

Talara Paita

• Pta. La Negra

Pimentel Chicama Salaverry Chimbote Casma Huarmey Huacho Callao Cerro Azul Pisco

• Pta. Dona Maria

Punta Sal Punta Gobernador Morrope Cherrepe Punta Chao Punta Lobos

• Pto. Bermejo

Supe Chancay Pucusana Tambo de Mora Bahia Independencia

CRUCERO 980205 SALINIDAD (UPS)

1996 1997 1998 1999 2000 2001

Purse seine fleet Fishing set: Cruise survey

2002 2003 2004 2005 2006 2007

• Pta. Dona Maria

San Juan Chala Atico Matarani Ilo Punta Caballas San Juan Chala Atico Matarani Ilo Punta Caballas

• Pta. Dona Maria

San Juan Chala Atico Matarani Ilo Punta Caballas

• Pta. Dona Maria

San Juan Chala Atico Matarani Ilo Punta Caballas San Juan Chala Atico Matarani Ilo Punta Caballas

SLIDE 9

Alimentación Alimentación

• 18
• 16
• 14
• 12
• 10
• 8
• 6
• 4

PAITA

• PTA. FALSA

PIMENTEL CHICAMA CHIMBOTE HUARMEY HUACHO CALLAO CERRO AZUL PISCO

• PTA. DOÑA MARIA

SAN JUAN ATICO QUILCA ILO

Callao

Pisco: Crustaceos (copepodos y zoeas) Ilo: crustaceos

V: EUF O: AN I: EUF P:EUF

1996 1997 1998 1999 2000 2001

2002

2003 2004 2005 2006 2007

V: EUF O: EUF I: EUF P: EUF V: EUF O: AN I: EUF P:EUF V: COP O: ANF I: PM P: EUF V: EUF O: AN I: EUF P:EUF V: EUF O: EUF I: EUF P: EUF EUF ZOE EUF O: LP EUF ZOEA EUF ZOEA EUF ZOEA EUF EUF ZOEA TELE EUF V: PM I: PM V: PM I: PM EUF ZOEA V: PM I: PM EUF ZOE EUF ZOE EUF ZOE EUF V: PM EUF ZOE EUF V: PM I: PM V: PM I: PM O: LP

Pleuroncodes monodon

Blaskovich et al., 2007(no publicado) Norte Centro Sur

Why “disappears”? Why stay there and why not return?

Availability of food and favorable oceanographic conditions? Unfavorable oceanographic conditions? Predation?

SLIDE 10

Conclusions: Conclusions:

The latitudinal distribution of the catches of jack mackerel clearly showed a change in the distribution of this resource, probably from north to south since 1998. Since 2002, jack mackerel passed definitely to have a central-south distribution, “disappearing” in the north. Hence, we define two scenarios: Scenario 1 (1996-2001): north-central distribution Scenario 2 (2002-2007): central-south distribution.

Thanks you !!!! Thanks you !!!! Thanks you !!!! Thanks you !!!!

The change in the distribution of jack mackerel to the south was partially determined by environmental conditions and the convergence of other factors such as food.